I recently installed Ubuntu 18.04 on my ASUS X512D, and I have a problem resuming from sleep mode: the screen is black (with a working pointer) or corrupted and the only thing I can do is manually reboot the computer (and loose my work). Pretty annoying for a laptop..
Computer: AMD Ryzen R5 / AMD Radeon Vega 8 / Dual boot with WIN10
Link for specs: ASUS Zenbook S512DA-EJ162T
A picture of my corrupted screen: Corrupted screen after sleep mode
What I tried:
- Switching to lightdm, even worse (not even the pointer on screen) so I got back to gdm3
- Updating kernel (I tried several ones, now I run the lastest mainline one, 5.2.5)
- A lot of things from forums and other AskUbuntu posts
I also went to Software update > additional drivers and it doesn't show any proprietary driver
Another element, I had to reinstall Ubuntu because on the first try the GPU was not recognized and Ubuntu said in the settings Unknown screen. I guess buying a computer with an AMD proc was not such a good idea to use it with Ubuntu..
Thank you to anyone who'd try helping me!
Best Answer
I finally managed to fix it, and here are the steps for people having the same issue.
1. Switch from gdm3 to lightdm
To do this, open a terminal and type
sudo apt-get install lightdm
, orsudo dpkg-reconfigure lightdm
and when asked, select lightdm as your default display manager2. Try the fix
Start your system and wait for the GRUB menu to show (if you don't see a GRUB menu, press and hold the left Shift key right after starting the system).
Now highlight the kernel you want to use, and press the e key. You should be able to see and edit the commands associated with the highlighted kernel.
Go down to the line starting with linux and add at the end:
amd_iommu=off
. Generally, the end of the line will look like this:quiet splash amd_iommu=off
Now press Ctrl + x to boot.
Open your session and try suspending by closing the lid
3. Make the fix permanent
From a terminal (or after pressing Alt + F2) run:
gksudo gedit /etc/default/grub
(or use
sudo nano
ifgksudo
orgedit
are not available) and enter your password.Find the line starting with
GRUB_CMDLINE_LINUX_DEFAULT
and appendamd_iommu=off
to its end. For example:GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amd_iommu=off"
Save the file and close the editor.
Finally, start a terminal and run:
sudo update-grub
to update GRUB's configuration file (you probably need to enter your password).
I also noticed that you cannot suspend with a long press on the power button in the top-right Ubuntu menu, as it results to a crash on wake up.
--
Sources:
https://bbs.archlinux.org/viewtopic.php?pid=1858315#p1858315
https://askubuntu.com/a/19487/981926
https://askubuntu.com/a/152381/981926